EP0118454A1 - Ignition coil for internal combustion engines. - Google Patents

Ignition coil for internal combustion engines.

Info

Publication number
EP0118454A1
EP0118454A1 EP83901931A EP83901931A EP0118454A1 EP 0118454 A1 EP0118454 A1 EP 0118454A1 EP 83901931 A EP83901931 A EP 83901931A EP 83901931 A EP83901931 A EP 83901931A EP 0118454 A1 EP0118454 A1 EP 0118454A1
Authority
EP
European Patent Office
Prior art keywords
circuit
sheets
ignition coil
branch
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83901931A
Other languages
German (de)
French (fr)
Other versions
EP0118454B1 (en
Inventor
Jean Marie Pierret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0118454A1 publication Critical patent/EP0118454A1/en
Application granted granted Critical
Publication of EP0118454B1 publication Critical patent/EP0118454B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines

Definitions

  • the present invention relates to an ignition coil, for internal combustion engines, ignition coil comprising: a closed magnetic circuit consisting of sheets cut and stacked on each other; a permanent magnet disposed in a branch of thickness E of said circuit; primary and secondary windings housed in an insulating box surrounding another branch of thickness E '.
  • This ignition coil has a magnetic flux bypass circuit, so that the flow reversal created in the branch, of thickness E ', by the current flowing in the primary winding, does not demagnetize the magnet permanent.
  • This magnetic flux bypass circuit consists of two sheets of mild steel, which sheets have a tab provided with a hole, or an opening, receiving one of the fixing screws of the ignition coil on the motor vehicle.
  • Such known ignition coils in particular by French patent applications: FR-A-2,476,218 and 2,486,160, have the disadvantage that in order to secure, with the aid of rivets, the branches of thickness E and E ', it it is necessary to provide a covering of the ends of the branch E ', which leads to providing a cutting tool for the sheets constituting the thick branch E' and three cutting tools for all the sheets constituting the branch E.
  • the magnetic circuit can only be joined after having placed the insulating box, containing the primary and secondary windings, on the branch of thickness E 'and having subsequently stacked a number of sheets of the branch of thickness E, so as to constitute a packet of thickness corresponding to the thickness E '. After which, in a third step, the circuit must be completed by the sheets of the branch of thickness E which ensure the covering of the ends of the branch of thickness E '.
  • the object of the present invention is to remedy these drawbacks and to this end relates to a coil with a closed magnetic circuit, consisting of cut sheets stacked on top of each other, ignition coil comprising a permanent magnet disposed in one of the branches, of the closed magnetic circuit; primary and secondary windings housed in an insulating box surrounding another branch, and a circuit for bypassing the magnetic flux, characterized in that the closed magnetic circuit comprises a first part of thickness E 'and of U shape, of which the one of the portions is cut in a bevel and a second part of thickness E greater than the thickness E ', which second part of L-shape comprises a portion cut in a bevel so that, after positioning, on the branch of thickness E ′, of the insulating case containing the primary and secondary windings, and insertion between the bevelled portions of the first and second parts, said parts are secured by means of the sheets constituting the circuit for deriving the magnetic flux.
  • a first advantage obtained by this invention is that the cutting of the sheets of the magnetic circuit requires only one tool per part, which reduces the expenses relating to the cutting tools.
  • a second advantage is the reduction in assembly time, due to the fact that the sheets which, in the prior art ensured the connection of the magnetic circuit, by covering the ends of the branch E ', are eliminated, the magnetic circuit being secured by an extension of the sheets constituting the bypass circuit of the magnetic flux.
  • Figure 1 is a longitudinal view of an ignition coil according to the invention.
  • FIG. 2 is a side view along arrow A of the ignition coil of FIG. 1.
  • FIG. 3 is a side view, along arrow B, of the ignition coil of FIG. 1.
  • FIG. 4 is a view, from above, of the cut sheets constituting by stacking one on top of the other, the first and second parts of the closed magnetic circuit of the ignition coil of FIG. 1.
  • Figure 5 is a top view of one of the two sheets constituting the bypass circuit, of the magnetic flux, which is provided the ignition coil of figure 1.
  • the ignition coil according to the invention comprises a closed magnetic circuit 1 made up of sheets cut and stacked one on top of the other.
  • a permanent magnet 2 magnetized in the direction of its thickness is placed in a branch 3 of the closed magnetic circuit 1.
  • a primary winding 4 and a secondary winding 5 housed in an insulating box 6 are embedded in a resin 7, the insulating box 6 surrounding a branch 8 of thickness E ′, FIGS. 1, 2 and 3
  • the magnetic flux bypass circuit consists of two sheets 9, of mild steel, arranged, by means of insulating plates 10 and 11, of on either side of the plans defining the thickness E of the branch 3.
  • the closed magnetic circuit 1 comprises a first part 12, FIGS. 1 and 4.
  • the first part 12 consists of sheets, cut into a U-shape, comprising a portion 12a cut in a bevel 12b. After stacking the sheets on top of each other, the portion 12a forms a half-branch of the branch 3, and a portion 12c forms the branch 8 of the closed magnetic circuit 1.
  • a second part 13, of the closed magnetic circuit 1, FIGS. 1 and 4 is made up of sheets cut out in the shape of an L, which sheets comprise a portion 13a cut out in bevel 13b so as to form the other half-branch of branch 3 .
  • the first and second parts 12 and 13 are secured, using known means, such as rivets 14, 15, and by extensions 9b of the sheets 9 constituting the bypass circuit of the magnetic flux.
  • the portion 13a of the second part 13 of the closed magnetic circuit 1 and the permanent magnet 2, FIG. 3 are in contact with the sheets 9 of the magnetic flux bypass circuit so that the air gap reluctance of said circuit is equivalent to the air gap reluctance of the circuit described in French patent application FR-A-2,486,160. Consequently, the plates 10 and 11 of the present invention have a thickness equal to 2d relative to the thickness d of the insulating plates of the French patent application FR-A-2,486, 160.
  • the insulating plates 10 and 11 are molded with the insulating casing 6, and their internal faces 10a and 11a constitute a housing for the portion 12a of the first part 12 of the closed magnetic circuit 1, FIG. 3.
  • the extension 9b of the sheets 9 includes a bend 9c, FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Bobine comprenant un circuit magnétique fermé (1), constitué de tôles découpées et empilées, de façon à former une première partie (1), de forme en U, dont l'une des portions (12a) est découpée en biseau (12b), une deuxième partie (13), de forme en L, comporte une portion (13a) découpée en biseau (13b) de manière qu'après mise en place, sur la branche (8), d'un boîtier isolant (6) contenant des enroulements primaire (4) et secondaire (5) et insertion d'un aimant permanent (2) entre les biseaux (12b et 13b) les première et deuxième parties (12 et 13) soient solidarisées, par l'intermédiaire de rivets (14, 15) et des prolongements (9b) des tôles (9) constituant un circuit de dérivation du flux magnétique créé par l'enroulement primaire (4).Coil comprising a closed magnetic circuit (1), consisting of cut and stacked sheets, so as to form a first part (1), U-shaped, one of the portions (12a) of which is cut in a bevel (12b), a second part (13), L-shaped, comprises a portion (13a) cut out at a bevel (13b) so that, after placement, on the branch (8), of an insulating housing (6) containing primary (4) and secondary (5) windings and insertion of a permanent magnet (2) between the bevels (12b and 13b) the first and second parts (12 and 13) are secured, by means of rivets (14, 15) and extensions (9b) of the sheets (9) constituting a bypass circuit for the magnetic flux created by the primary winding (4).

Description

BOBINE D'ALLUMAGE POUR MOTEURS A COMBUSTION INTERNE IGNITION COIL FOR INTERNAL COMBUSTION ENGINES
La présente invention concerne une bobine d'allumage, pour moteurs à combustion interne, bobine d'allumage comportant : un circuit magnétique fermé constitué de tôles découpées et empilées les unes sur les autres ; un aimant permanent disposé dans une branche d'épaisseur E dudit circuit ; des enroulements primaire et secondaire logés dans un boitier isolant entourant une autre branche d'épaisseur E' .The present invention relates to an ignition coil, for internal combustion engines, ignition coil comprising: a closed magnetic circuit consisting of sheets cut and stacked on each other; a permanent magnet disposed in a branch of thickness E of said circuit; primary and secondary windings housed in an insulating box surrounding another branch of thickness E '.
Cette bobine d'allumage comporte un circuit de dérivation dυ flux magnétique, de manière que l'inversion de flux crée dans la bran che, d'épaisseur E', par le courant circulant dans l'enroulement primaire, ne désaimante pas l'aimant permanent.This ignition coil has a magnetic flux bypass circuit, so that the flow reversal created in the branch, of thickness E ', by the current flowing in the primary winding, does not demagnetize the magnet permanent.
Ce circuit de dérivation du flux magnétique est constitué par deux tôles, en acier doux, lesquelles tôles comportent une patte munie d'un trou, ou d'une ouverture, recevant l'une des vis de fixation de la bobine d'allumage sur le véhicule automobile.This magnetic flux bypass circuit consists of two sheets of mild steel, which sheets have a tab provided with a hole, or an opening, receiving one of the fixing screws of the ignition coil on the motor vehicle.
De telles bobines d'allumage connues, notamment par les demandes françaises de brevet : FR-A-2,476,218 et 2,486,160, présentent l'inconγénient que pour solidariser, à l'aide de rivets, les branches d'épaisseur E et E', il est nécessaire de prévoir un recouvrement des extrémités de la branche E', ce qui conduit à prévoir un outil de découpe pour les tôles constituant la branche d'épaisseur E' et trois outils de découpe pour l'ensemble des tôles constituant la branche E.Such known ignition coils, in particular by French patent applications: FR-A-2,476,218 and 2,486,160, have the disadvantage that in order to secure, with the aid of rivets, the branches of thickness E and E ', it it is necessary to provide a covering of the ends of the branch E ', which leads to providing a cutting tool for the sheets constituting the thick branch E' and three cutting tools for all the sheets constituting the branch E.
Un autre inconvénient est que le circuit magnétique ne peut être solidarisé qu'après avoir disposé le boitier isolant, contenant les enroulements primaire et secondaire, sur la branche d'épaisseur E' et avoir dans un deuxième temps empilé un certain nombre de tôles de la branche d'épaisseur E, de manière à constituer un paquet d'épaisseur correspondante à l'épaisseur E'. Après quoi, dans un troisième temps, le circuit doit être complété par les tôles de la branche d'épaisseur E qui assurent le recouvrement des extrémités de la branche d'épaisseur E'.Another drawback is that the magnetic circuit can only be joined after having placed the insulating box, containing the primary and secondary windings, on the branch of thickness E 'and having subsequently stacked a number of sheets of the branch of thickness E, so as to constitute a packet of thickness corresponding to the thickness E '. After which, in a third step, the circuit must be completed by the sheets of the branch of thickness E which ensure the covering of the ends of the branch of thickness E '.
Cette succession d'opérations représente une part non négligeable du prix de revient de ces bobines. La présente invention a pour but de remédier à ces inconvénients et concerne à cet effet une bobine à circuit magnétique fermé, constitué de tôles découpées et empilées les unes sur les autres, bobine d'allumage comportant un aimant permanent disposé dans l'une des branches, du circuit magnétique fermé ; des enroulements primaire et secondaire logés dans un boitier isolant entourant une autre branche, et un circuit de dérivation du flux magnétique, caractérisée en ce que le circuit magnétique fermé comprend une première partie d'épaisseur E' et de forme en U, dont l'une des portions est découpée en biseau et une deuxième partie d'épaisseur E supérieure à l' épaisseur E', laquelle deuxième partie de forme en L comporte une portion découpée en biseau de manière qu'après mise en place, sur la branche d'épaisseur E', du boitier isolant contenant les enroulements primaire et secondaire, et insertion entre les portions biseautées des première et deuxième parties, les dites parties soient solidarisées par l'intermédiaire des tôles constituant le circuit de dérivation du flux magnétique. Un premier avantage obtenu par cette invention est que la découpe des tôles du circuit magnétique ne requière qu'un outil par partie, ce qui réduit les dépenses concernant les outils de découpe. Un deuxième avantage est la diminution du temps d'assemblage, en raison du fait que les tôles qui, dans la technique antérieure assuraient la solidarisation du circuit magnétique, par recouvrement des extrémités de la branche E', sont supprimées, le circuit magnétique étant solidarisé par un prolongement des tôles constituant le circuit de dérivation du flux magnétique. La description qui va suivre en regard des dessins annexés fera mieux comprendre comment l'invention peut être réalisée,This succession of operations represents a significant part of the cost price of these coils. The object of the present invention is to remedy these drawbacks and to this end relates to a coil with a closed magnetic circuit, consisting of cut sheets stacked on top of each other, ignition coil comprising a permanent magnet disposed in one of the branches, of the closed magnetic circuit; primary and secondary windings housed in an insulating box surrounding another branch, and a circuit for bypassing the magnetic flux, characterized in that the closed magnetic circuit comprises a first part of thickness E 'and of U shape, of which the one of the portions is cut in a bevel and a second part of thickness E greater than the thickness E ', which second part of L-shape comprises a portion cut in a bevel so that, after positioning, on the branch of thickness E ′, of the insulating case containing the primary and secondary windings, and insertion between the bevelled portions of the first and second parts, said parts are secured by means of the sheets constituting the circuit for deriving the magnetic flux. A first advantage obtained by this invention is that the cutting of the sheets of the magnetic circuit requires only one tool per part, which reduces the expenses relating to the cutting tools. A second advantage is the reduction in assembly time, due to the fact that the sheets which, in the prior art ensured the connection of the magnetic circuit, by covering the ends of the branch E ', are eliminated, the magnetic circuit being secured by an extension of the sheets constituting the bypass circuit of the magnetic flux. The description which follows with reference to the appended drawings will make it easier to understand how the invention can be implemented,
La figure 1 est une vue longitudinale d'une bobine d'allumage selon l'invention.Figure 1 is a longitudinal view of an ignition coil according to the invention.
La figure 2 est une vue de coté suivant la flèche A, de la bobine d'allumage de la figure 1. La figure 3 est une vue de coté, suivant la flèche B, de la bobine d'allumage de la figure 1.FIG. 2 is a side view along arrow A of the ignition coil of FIG. 1. FIG. 3 is a side view, along arrow B, of the ignition coil of FIG. 1.
La figure 4 est une vue, de dessus, des tôles découpées constituant par empilage les unes sur les autres, les première et deuxième parties du circuit magnétique fermé de la bobine d'allumage de la figure 1.FIG. 4 is a view, from above, of the cut sheets constituting by stacking one on top of the other, the first and second parts of the closed magnetic circuit of the ignition coil of FIG. 1.
La figure 5 est une vue, de dessus, d'une des deux tôles constituant le circuit de dérivation, du flux magnétique, dont est munie la bobine d'allumage de la figure 1.Figure 5 is a top view of one of the two sheets constituting the bypass circuit, of the magnetic flux, which is provided the ignition coil of figure 1.
Selon un mode préféré de réalisation, la bobine d'allumage selon l'invention, figure 1, comporte un circuit magnétique fermé 1 cons titué de tôles découpées et empilées les unes sur les autres. De façon connue, par la demande française de brevet : FR-A-2,476, 218, un aimant permanent 2, aimanté dans le sens de son épaisseur est disposé dans une branche 3 du circuit magnétique fermé 1.According to a preferred embodiment, the ignition coil according to the invention, FIG. 1, comprises a closed magnetic circuit 1 made up of sheets cut and stacked one on top of the other. In a known manner, by the French patent application: FR-A-2,476, 218, a permanent magnet 2, magnetized in the direction of its thickness is placed in a branch 3 of the closed magnetic circuit 1.
Un enroulement primaire 4 et un enroulement secondaire 5 logés dans un boitier isolant 6 sont noyés dans une résine 7, le boitie isolant 6 entourant une branche 8 d'épaisseur E', figures 1,2 et 3A primary winding 4 and a secondary winding 5 housed in an insulating box 6 are embedded in a resin 7, the insulating box 6 surrounding a branch 8 of thickness E ′, FIGS. 1, 2 and 3
De façon connue, par la demande française de brevet : FR-A-2,486, 160 le circuit de dérivation du flux magnétique est constitué de deux tôles 9, en acier doux, disposées, par l'intermédiaire de plaquettes isolantes 10 et 11, de part et d'autre des plans défi nissant l'épaisseur E de la branche 3.In a known manner, by the French patent application: FR-A-2,486, 160 the magnetic flux bypass circuit consists of two sheets 9, of mild steel, arranged, by means of insulating plates 10 and 11, of on either side of the plans defining the thickness E of the branch 3.
Les tôles 9, cambrées de façon symétrique, comportent une patte 9a, munie d'un trou, ou d'une ouverture, non représentés, de manière à assurer la fixation de la bobine d'allumage sur le véhicule automobile. Conformément à l'invention, le circuit magnétique fermé 1, comprend une première partie 12, figures 1 et 4.The sheets 9, arched symmetrically, have a tab 9a, provided with a hole, or with an opening, not shown, so as to ensure the fixing of the ignition coil to the motor vehicle. According to the invention, the closed magnetic circuit 1 comprises a first part 12, FIGS. 1 and 4.
La première partie 12 est constituée de tôles, découpées en forme de U, comprenant une portion 12a découpée en biseau 12b. Après empilage des tôles les unes sur les autres, la portion 12a forme une demi-branche de la branche 3, et une portion 12c forme la branche 8 du circuit magnétique fermé 1.The first part 12 consists of sheets, cut into a U-shape, comprising a portion 12a cut in a bevel 12b. After stacking the sheets on top of each other, the portion 12a forms a half-branch of the branch 3, and a portion 12c forms the branch 8 of the closed magnetic circuit 1.
Une deuxième partie 13, du circuit magnétique fermé 1 , figures 1 et 4, est constituée de tôles découpées en forme de L, lesquelles tôles comprennent une portion 13a découpée en biseau 13b de manièr à former l'autre demi-branche de la branche 3.A second part 13, of the closed magnetic circuit 1, FIGS. 1 and 4, is made up of sheets cut out in the shape of an L, which sheets comprise a portion 13a cut out in bevel 13b so as to form the other half-branch of branch 3 .
Les première et deuxième partie 12 et 13 sont solidarisées, à l'aide de moyens connus, tels des rivets 14, 15, et par des prolongements 9b des tôles 9 constituant le circuit de dérivation du flux magnétique. Selon la présente invention, la portion 13a de la deuxième partie 13 du circuit magnétique fermé 1 et l'aimant permanent 2, figure3 sont en contact avec les tôles 9 du circuit de dérivation du flux magnétique de manière que la réluctance d'entrefer dudit circuit soit équivalente à la réluctance d'entrefer du circuit décrit dans la demande française de brevet FR-A-2,486,160. En conséquence, les plaquettes 10 et 11 de la présente invention ont une épaisseur égale à 2d par rapport à l'épaisseur d des plaquettes isolantes de la demande française de brevet FR-A-2,486, 160.The first and second parts 12 and 13 are secured, using known means, such as rivets 14, 15, and by extensions 9b of the sheets 9 constituting the bypass circuit of the magnetic flux. According to the present invention, the portion 13a of the second part 13 of the closed magnetic circuit 1 and the permanent magnet 2, FIG. 3 are in contact with the sheets 9 of the magnetic flux bypass circuit so that the air gap reluctance of said circuit is equivalent to the air gap reluctance of the circuit described in French patent application FR-A-2,486,160. Consequently, the plates 10 and 11 of the present invention have a thickness equal to 2d relative to the thickness d of the insulating plates of the French patent application FR-A-2,486, 160.
Selon la présente invention les plaquettes isolantes 10 et 11 viennent de moulage avec le boitier isolant 6, et leurs faces internes 10a et 11a constituent un logement pour la portion 12a de la première partie 12 du circuit magnétique fermé 1, figure 3.According to the present invention, the insulating plates 10 and 11 are molded with the insulating casing 6, and their internal faces 10a and 11a constitute a housing for the portion 12a of the first part 12 of the closed magnetic circuit 1, FIG. 3.
De manière à compenser la différence des épaisseurs E et E' le prolongement 9b des tôles 9 comporte un cambrage 9c, figure 2. In order to compensate for the difference in thicknesses E and E ', the extension 9b of the sheets 9 includes a bend 9c, FIG. 2.

Claims

REVENDICATIONS
1. Bobine d'allumage pour moteurs à combustion interne, bobine comportant : un circuit magnétique fermé (1) constitué de tôles découpées et empilées les unes sur les autres ; un aimant permanen (2) disposé dans une branche (3) du circuit (1) ; des enroulements primaire (4) et secondaire (5) entourant une autre branche (8) du circuit (1), bobine d'allumage comprenant un circuit de dérivation du flux magnétique, circuit constitué de tôles (9) en acier doux, bobine caractérisée en ce que le circuit magnétique fermé (1) comprend une première partie (12), d'épaisseur E' et de forme en U, dont l'une des portions (12a) est découpée en biseau (12b) et une deuxième partie (13) d'épaisseur E supérieure a l'épaisseur E', laquelle deuxième partie (13) de forme en L, comporte une portion (13a) découpée en biseau (13b) de manière qu'après mise en place du boitier isolant (6) sur la branche (8) et insertion de l'aimant permanent (2) entre les biseaux (12b, 13b) les première et deuxième parties (12,13) soient solidarisées par l'intermédiaire de rivets (14,15) et des prolongements (9b) des tôles (9) constituant le circuit de dérivation . du flux magnétique crée par l'enroulement primaire (4). 1. Ignition coil for internal combustion engines, coil comprising: a closed magnetic circuit (1) consisting of cut sheets stacked on top of each other; a permanent magnet (2) disposed in a branch (3) of the circuit (1); primary (4) and secondary (5) windings surrounding another branch (8) of the circuit (1), ignition coil comprising a circuit for bypassing the magnetic flux, circuit consisting of sheets (9) of mild steel, coil characterized in that the closed magnetic circuit (1) comprises a first part (12), of thickness E 'and U-shaped, one of the portions (12a) of which is cut in a bevel (12b) and a second part ( 13) of thickness E greater than the thickness E ', which second part (13) of L-shape, comprises a portion (13a) cut into a bevel (13b) so that after the insulating housing (6 ) on the branch (8) and insertion of the permanent magnet (2) between the bevels (12b, 13b) the first and second parts (12,13) are secured by means of rivets (14,15) and extensions (9b) of the sheets (9) constituting the branch circuit. of the magnetic flux created by the primary winding (4).
2. Bobine d'allumage selon la revendication 1, caractérisée en ce que la portion (13a.) de la deuxième partie (13) du circuit magnétique fermé (1) et l'aimant permanent (2) sont en contact avec les tôles (9) du circuit de dérivation du flux magnétique.2. Ignition coil according to claim 1, characterized in that the portion (13a.) Of the second part (13) of the closed magnetic circuit (1) and the permanent magnet (2) are in contact with the sheets ( 9) of the magnetic flux bypass circuit.
3. Bobine d'allumage selon la revendication 1, caractérisée en ce que la portion (12a) de la première partie (12) du circuit magnétique fermé (1 ) est disposée à l'intérieur d'un logement constitué par les faces internes (10a, 11a) des plaquettes (10,11) venant de matière avec le boitier isolant (6).3. Ignition coil according to claim 1, characterized in that the portion (12a) of the first part (12) of the closed magnetic circuit (1) is arranged inside a housing formed by the internal faces ( 10a, 11a) of the plates (10,11) made in one piece with the insulating case (6).
4. Bobine d'allumage selon la revendication 1, caractérisée en ce que le prolongement (9b) des tôles (9) comporte à son extrémité un cambrage (9c). 4. Ignition coil according to claim 1, characterized in that the extension (9b) of the sheets (9) comprises at its end a camber (9c).
EP83901931A 1982-08-11 1983-07-01 Ignition coil for internal combustion engines Expired EP0118454B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8213965 1982-08-11
FR8213965A FR2531751A1 (en) 1982-08-11 1982-08-11 IGNITION COIL FOR INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0118454A1 true EP0118454A1 (en) 1984-09-19
EP0118454B1 EP0118454B1 (en) 1987-01-07

Family

ID=9276796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901931A Expired EP0118454B1 (en) 1982-08-11 1983-07-01 Ignition coil for internal combustion engines

Country Status (14)

Country Link
US (1) US4546753A (en)
EP (1) EP0118454B1 (en)
DE (1) DE3369027D1 (en)
ES (1) ES273881Y (en)
FR (1) FR2531751A1 (en)
IL (1) IL69457A (en)
IT (1) IT1168780B (en)
MA (1) MA19865A1 (en)
OA (1) OA07655A (en)
PT (1) PT77076B (en)
RO (1) RO88098A (en)
SU (1) SU1292671A3 (en)
UA (1) UA7144A1 (en)
WO (1) WO1984000843A1 (en)

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DE3619984A1 (en) * 1986-06-13 1987-12-17 Bosch Gmbh Robert Ignition coil for ignition systems of internal combustion engines
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JPH03149805A (en) * 1989-11-07 1991-06-26 Aisan Ind Co Ltd Ignition coil for internal combustion engine
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Also Published As

Publication number Publication date
OA07655A (en) 1985-05-23
IT1168780B (en) 1987-05-20
US4546753A (en) 1985-10-15
ES273881Y (en) 1985-01-01
FR2531751B1 (en) 1984-12-21
FR2531751A1 (en) 1984-02-17
ES273881U (en) 1984-06-16
MA19865A1 (en) 1984-04-01
SU1292671A3 (en) 1987-02-23
WO1984000843A1 (en) 1984-03-01
DE3369027D1 (en) 1987-02-12
RO88098B (en) 1985-10-31
IL69457A (en) 1987-09-16
IL69457A0 (en) 1983-11-30
RO88098A (en) 1985-11-30
EP0118454B1 (en) 1987-01-07
PT77076A (en) 1983-08-01
IT8348829A0 (en) 1983-08-09
PT77076B (en) 1986-01-27
UA7144A1 (en) 1995-06-30

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